OBSERVATION OF A MINIMUM IN COLLECTIVE FLOW FOR AR+V COLLISIONS

被引:47
作者
KROFCHECK, D
CEBRA, DA
CRONQVIST, M
LACEY, R
LI, T
OGILVIE, CA
VANDERMOLEN, A
TYSON, K
WESTFALL, GD
WILSON, WK
WINFIELD, JS
NADASEN, A
NORBECK, E
机构
[1] MICHIGAN STATE UNIV, DEPT PHYS & ASTRON, E LANSING, MI 48824 USA
[2] UNIV MICHIGAN, DEPT NAT SCI, DEARBORN, MI 48128 USA
[3] UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA 52242 USA
来源
PHYSICAL REVIEW C | 1991年 / 43卷 / 01期
关键词
D O I
10.1103/PhysRevC.43.350
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We have added a new measurement at 100 MeV/nucleon to our previous excitation function for collective flow of light fragments from Ar-40+V-51 collisions. In the earlier work, flow decreased as the beam energy was raised from 45 to 85 MeV/nucleon. This provided hints to the disappearance of flow, but the lack of measurements at higher beam energies precluded the observation of the reappearance of flow. At a beam energy of 100 MeV/nucleon the flow has reappeared and this allows an experimental determination of the region where attractive scattering balances with repulsive scattering in these collisions. A simultaneous least-squares fit of the flow data for light fragments yields (85+/-10) MeV/nucleon for the balance energy.
引用
收藏
页码:350 / 352
页数:3
相关论文
共 12 条
[1]   TRANSVERSE-MOMENTUM DISTRIBUTIONS IN INTERMEDIATE-ENERGY HEAVY-ION COLLISIONS [J].
BERTSCH, GF ;
LYNCH, WG ;
TSANG, MB .
PHYSICS LETTERS B, 1987, 189 (04) :384-387
[2]   A GUIDE TO MICROSCOPIC MODELS FOR INTERMEDIATE ENERGY HEAVY-ION COLLISIONS [J].
BERTSCH, GF ;
DASGUPTA, S .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 160 (04) :189-233
[3]   TRANSVERSE-MOMENTUM ANALYSIS OF COLLECTIVE MOTION IN RELATIVISTIC NUCLEAR COLLISIONS [J].
DANIELEWICZ, P ;
ODYNIEC, G .
PHYSICS LETTERS B, 1985, 157 (2-3) :146-150
[4]   TRANSVERSE-MOMENTA, NUCLEAR-EQUATION OF STATE, AND MOMENTUM-DEPENDENT INTERACTIONS IN HEAVY-ION COLLISIONS [J].
GALE, C ;
WELKE, GM ;
PRAKASH, M ;
LEE, SJ ;
DASGUPTA, S .
PHYSICAL REVIEW C, 1990, 41 (04) :1545-1552
[5]   DISAPPEARANCE OF FLOW IN HEAVY-ION COLLISIONS [J].
KROFCHECK, D ;
BAUER, W ;
CRAWLEY, GM ;
DJALALI, C ;
HOWDEN, S ;
OGILVIE, CA ;
VANDERMOLEN, A ;
WESTFALL, GD ;
WILSON, WK ;
TICKLE, RS ;
GALE, C .
PHYSICAL REVIEW LETTERS, 1989, 63 (19) :2028-2031
[6]  
MOLITORIS JJ, 1986, NUCL PHYS A, V447, pC13, DOI 10.1016/0375-9474(86)90595-6
[7]   TRANSVERSE COLLECTIVE MOTION IN INTERMEDIATE-ENERGY HEAVY-ION COLLISIONS [J].
OGILVIE, CA ;
CEBRA, DA ;
CLAYTON, J ;
DANIELEWICZ, P ;
HOWDEN, S ;
KARN, J ;
NADASEN, A ;
VANDERMOLEN, A ;
WESTFALL, GD ;
WILSON, WK ;
WINFIELD, JS .
PHYSICAL REVIEW C, 1989, 40 (06) :2592-2599
[8]   DISAPPEARANCE OF FLOW AND ITS RELEVANCE TO NUCLEAR-MATTER PHYSICS [J].
OGILVIE, CA ;
BAUER, W ;
CEBRA, DA ;
CLAYTON, J ;
HOWDEN, S ;
KARN, J ;
NADASEN, A ;
VANDERMOLEN, A ;
WESTFALL, GD ;
WILSON, WK ;
WINFIELD, JS .
PHYSICAL REVIEW C, 1990, 42 (01) :R10-R14
[9]   DETERMINATION OF THE IMPACT VECTOR IN INTERMEDIATE ENERGY HEAVY-ION COLLISIONS [J].
OGILVIE, CA ;
CEBRA, DA ;
CLAYTON, J ;
HOWDEN, S ;
KARN, J ;
VANDERMOLEN, A ;
WESTFALL, GD ;
WILSON, WK ;
WINFIELD, JS .
PHYSICAL REVIEW C, 1989, 40 (02) :654-663
[10]   DEFLECTION OF NONEQUILIBRIUM LIGHT PARTICLES BY THE NUCLEAR MEAN FIELD [J].
TSANG, MB ;
RONNINGEN, RM ;
BERTSCH, G ;
CHEN, Z ;
CHITWOOD, CB ;
FIELDS, DJ ;
GELBKE, CK ;
LYNCH, WG ;
NAYAK, T ;
POCHODZALLA, J ;
SHEA, T ;
TRAUTMANN, W .
PHYSICAL REVIEW LETTERS, 1986, 57 (05) :559-562